Con­tains some of the most sig­nif­i­cant rock art in North Amer­i­ca. The Great Gallery, the best known pan­el in Horse­shoe Canyon, includes well-pre­served, life-sized fig­ures with intri­cate designs. Oth­er impres­sive sights include spring wild­flow­ers, sheer sand­stone walls and mature cot­ton­wood groves along the inter­mit­tent stream in the canyon bot­tom.